Battery Storage Systems

A battery captures the electricity your panels generate when the sun is high and releases it when you need it — after dark, on cloudy days, or during peak-rate periods. That shift alone cuts the amount of grid power you buy, which is the single biggest lever for lowering running costs and improving energy independence. It also strengthens the case for a higher EPC rating, because stored solar counts as on-site renewable generation in the assessment methodology.

Without storage, a typical UK home exports a large share of its daytime output at low SEG rates, only to repurchase electricity at higher evening prices. A battery flips that dynamic: you keep more of what you produce and avoid the most expensive grid units. The result is a system that works harder for you across all 24 hours, not just the sunny ones.

Retrofitting a battery to an existing array is straightforward if the inverter is hybrid-ready or an AC-coupled unit is added; both routes keep the original MCS certification intact. Installing panels and battery together allows a single hybrid inverter, fewer components, and a cleaner commissioning process — often with lower overall labour time.

If you already have solar and export a noticeable portion of your generation, a battery will usually increase self-consumption without changing your SEG agreement. Homes with electric heating, EV charging, or high evening loads see the greatest benefit because they can align stored energy with their heaviest demand.

Properties without solar should consider a combined install — it avoids a second round of scaffolding, surveying, and paperwork. Either way, the system must be MCS-certified to retain SEG eligibility and access any future grant funding. A quick assessment of your meter data and roof layout will confirm the sizing and payback picture.

Get in touch for a personalised, no-obligation assessment.